A pair of conveyor rollers arranged in an image forming apparatus to convey a recording sheet is configured to be shiftable relative to the body between a first position and a second position. A first holding member is configured to support one of the conveyor rollers so that the supported conveyor roller is swingable around a pivot to allow the pair of conveyor rollers to be shifted between the first position and the second position. The first holding member including a sheet guide portion which provides a variable-position guideway extending from a position located upstream along the sheet conveyance path toward a peripheral surface of the supported conveyor roller, where the sheet guide portion moves to a position suitable to guide the recording sheet to be nipped by the pair of conveyor rollers at least when the pair of conveyor rollers is shifted to the first position.